Neil Armstrong, the first man to step foot on the moon, carried with him a piece of cloth and wood from the original 1903 Wright Flyer.
12
One pinhead of the sun's energy is enough to kill a person at a distance of 160 kilometers.
277
A comet's tail always points away from the sun.
2
The Earth weighs around 6,600,000,000,000,000,000,000 tons (5,940 billion billion metric tons)!
221
There are approximately 3,500 astronomers in the U.S. - but over 15,000 astrologers.
124
Tidal forces between the Earth and Moon are slowing the Earth down and pushing the Moon further away.
46
In the last 7 years, humanity has discovered 43 potentially habitable planets.
14
All of the Earth's continents are wider at the north than in the south - and nobody knows why.
194